Due to lack of financial support we can not sell our games . So I am asking can we sell the game to unity so
that the profit we get can be shared,
No, Unity won’t buy your games.
But, don’t worry, there’s a huge marketplace for selling your games.
You could sell your games on Play Store / Amazon App store for Android, Apple App Store for iOS, or steam for PC/Linux/Mac.
Check this answer for more information :
https://answers.unity.com/answers/400897/view.html